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perf auxtrace: Define auxtrace record alignment 

Define auxtrace record alignment so that it can be referenced elsewhere.

Note this is preparation for patch "perf intel-pt: Fix overlap calculation
for padding"

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20190206103947.15750-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2019-02-06 12:39:43 +02:00 committed by Arnaldo Carvalho de Melo
parent f08046cb30
commit c3fcadf0bb
2 changed files with 5 additions and 2 deletions
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4
tools/perf/util/auxtrace.c
View File

@ -1279,9 +1279,9 @@ static int __auxtrace_mmap__read(struct perf_mmap *map,
}
/* padding must be written by fn() e.g. record__process_auxtrace() */
padding = size & 7;
padding = size & (PERF_AUXTRACE_RECORD_ALIGNMENT - 1);
if (padding)
padding = 8 - padding;
padding = PERF_AUXTRACE_RECORD_ALIGNMENT - padding;
memset(&ev, 0, sizeof(ev));
ev.auxtrace.header.type = PERF_RECORD_AUXTRACE;

3
tools/perf/util/auxtrace.h
View File

@ -40,6 +40,9 @@ struct record_opts;
struct auxtrace_info_event;
struct events_stats;
/* Auxtrace records must have the same alignment as perf event records */
#define PERF_AUXTRACE_RECORD_ALIGNMENT 8
enum auxtrace_type {
PERF_AUXTRACE_UNKNOWN,
PERF_AUXTRACE_INTEL_PT,